Here are some examples of words that contain the root grat:
* Gratitude: A feeling of thankfulness and appreciation.
* Ingratiate: To gain favor with someone by flattering them.
* Gratuitous: Unnecessary or unwarranted.
* Gratuity: A tip or gift given for service.
* Gratis: Free of charge.
As you can see, the root grat often relates to feelings of pleasure, thankfulness, or favor.